If turning an existing 10-spd SRAM into 11spd using the exact same spacing as the 10spd, then yes, it's been done before on this forum - twice - and there are threads devoted to that.

If turning an existing 10-spd SRAM into an 11-spd using the new spacing found on the official 11spd SRAM, then no. Assuming the spacing is different from 10spd, and therefore the spacing the ratchet will be different, not just a matter of adding an extra notch on the ratchet.

I meant using the official 2013 Red or Force 22 internals to turn 2012 Red 10sp into official 11sp. I did not mean hacking existing 2012 Red 10sp internals into 11sp which as been done before has you point out. And for clarity sake assume I have an 11sp Shimano hub already.

I would contact your vendor, see what they are hearing, and where you are on their list of preorders. I hadn't heard the June 1 availability, but considering they haven't hit the pro peloton first, trickle down (for the drivetrain components) may be very limited for individuals for the time being.

For me an 11-25 has no benefits over my 9 speed 12-23, since I have no need for an 11 or 25 tooth. I'ld like to see an 11 speed 12-23.Seems like they are seeing this 11 speed craze as a means to manufacture fewer choices (which is a lot cheaper for them).

Think I will go for a 10 speed SRAM group with an Ultegra 12-23 10 speed cassette. That gives me an 18 tooth cog and fits on my current wheelset too.

I wouldn't really hold your breath for a 12-23 since that's practically a straight block and most people live in a place with enough small hills to need an expanded range. Shimano makes a 12-25 so you could try that.

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